Brake-lining



F. J..GLEASON. BRAKE`LINING. APPLxcATloN HLED Aue.1, 14918.

Patented June 1,19%.;-

ff w c1.

To all whom 'it may concern:

UNITED si'rarss saveur osi-uca.

FREDERICK J. GLEASON, OVF WALPOLE, MASSACHUSETTS.

BRAKE-LININ'G.

Application filed August 1,

Be it known that I, FREDERICK J. GLEA- soN, a citizen of the United States, and resident of IValpole, county of Norfolk, Commonwealth of Massachusetts, have invented an improvement in Brake-Linings, of which A dering the lining water-proof land largelyv fire-proof, etc. Woven brake linings of this character have heretofore been either of a relatively coarse and rough weave, or they have been made of a relatively fine weave and built up of successive layers of such finer weave folded and stitched together. |lhe coarse woven-type of lining has had the advantage that oil, dirt or grit and other foreign matter can work up into the interstices, while this type has had the objectionthat it tends to become loose with a separation of the layers, z'. e., it tends to crawL AThe relatively fine woven folded and stitched type of lining on the other hand involves a selvage edge to keep the same from fraying out and there is a tendency to a relative shifting of the series of layers of which this is built up, this type however having the advantage of holding the rivets more securely and with less tendency to displacement on the brake band. The prime object of the present invention is to provide an improved composite or built up type of brake lining embodying the advantages of both of the above mentioned types of lining and doing away vwith the disadvantages of each. vTo this end I provide a lining composed of an inner layer of relatively coarse or rough woven fabric and secure the same preferably by vulcani- Zation and also if desired by stitching or the like to an outer lining portion composed ofl folded layers ofrelatively fine woven fabric. The foregoing andv other objects and advantages of the invention will more fully appear from the following detailed description. and the distinctive features of novelty will be pointed out in the appended claims,

YSpecification of Letters Patent.

`Patented J une 1, 1920.

1918. serial No. 247,759.'

Referring to the drawings:

Figure 1 is a plan View with a part broken away showing a portion of a brake lining constructed in accordance with 'my invention; L

Fig.2 is an edgeV view; y

Fig. 3 isa transverse section on line 3-3 of Fig; 1;

F ig. 4 is an enlarged transverse section on line 4 4 of Fig. 1; and y Fig. 5 is a -perspective'view showing a part of a brake with a lining made in accordance with my invention.

` In the -practice of my invention I p'ro'- vide an inner layer of relatively coarse or rough woven fabric 10 `impregnated with suitable material for obtaining the vproper friction co-efficient and rendering the lining substantially water-proof and fire-proof. To this inner layer I secure `one or more layers of relatively line woven fabric '11,

three of such layers 11a4 vbeing shown as folded and stitched togetherto make this backing portion of the lining, and stitched together at theiredges as seen at 1lb. These lining portions comprising the inner; coarse woven fabric 10 and the'series of fine woven folded layers 11 are then secured together either by vulcanizing or by stitching 12`or both, it being noted that the impregnating composition employed is usually of a more or less rubber like nature capableof vuloanization to bring it to a proper condition for use, and advantage may be taken of this fact to unite the inner and outer lining layers into a unitary mass by having'v them held pressed together in the vulcanizing operation. as usual as seen at 13 to a brake band 14 by rivets or the like 15, and these passing through the relativelyv fine woven backing layers 11 will hold the lining secure against shifting or crawling, while the inner coarse woven fabric layer 10 will receive into its interstices foreign particles of grit, as well In use the present lining is applied l as holding oil, and is thus most effective v for its purpose, as well as being much moreI y durable in use. I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and'I theref fore desirethe present embodiment to be considered in all respects as illustrative and not restrictive, reference being' had to the appended claimsY rather than to the foregoing description -to indicate the." scope of A the invention. e v

Having described my invention what I claim as new and desire to secure by Letters a layer v o f relatlvely coarse Woven-fabric pre-l 25 senting relatively large surface. areas'oi- 5 Patent is:

l. A brake lining built up ,of anti-nner-4 layer of relatively coarse wovenfabric pre-` senting relatively large Vsurface areas of open interstices,` and. a backin secured 10 thereto'of relatively fine wovenabric; 2. `Abrakelining built up Oaninnerf layer of relatively-coarsewoven fabric presenting relatively. large surface 'areas o fr4 open lntersticesyand an outer "backing `-se- 15 cured theretov composedof a series'of folded` layers of relativelyline woven. fabric-- layer, and a series ofrelativel lfine woven 2o layers securedlthereto as a bac 'ng impregsubstance serving also as fa binder to unitesaid inner andbacking layersvtogether.

4Q A- brake lining, composed of van inner open interstices', and an outer backing securedl theret'or'composed of a 4 luralitybf :layers of-relatively finevoven abrio.

" 5. A brake lining,-composed of an inner '3'0- liayerof relatively coarse Woven fabric presenting -re'latively large surface areas of -open interstices, and an 'outer backing se-v curedv thereto composed of a, plurality o f layers" of relatively fine woven fabric, said 35 'finnrilayer and outer -backingfsecured to-- 3. A brakey lining','compos ed of 'a relatively coarse woven impregnated innergetherby a vulcanizing binder..

name to 'this iecification.v

DERICK J. errtnitsolv, 

